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Revenue - Narrative (Details) $ in Millions	Dec. 31, 2024 CAD ($)
Disclosure of disaggregation of revenue from contracts with customers [line items]
Remaining performance obligations	$ 2,336
Contract liabilities	36
Heartland Generation
Disclosure of disaggregation of revenue from contracts with customers [line items]
Contract liabilities	6
2025 to 2027
Disclosure of disaggregation of revenue from contracts with customers [line items]
Remaining performance obligations	455
2028 to 2030
Disclosure of disaggregation of revenue from contracts with customers [line items]
Remaining performance obligations	391
2031 to 2035
Disclosure of disaggregation of revenue from contracts with customers [line items]
Remaining performance obligations	668
2036 and Thereafter
Disclosure of disaggregation of revenue from contracts with customers [line items]
Remaining performance obligations	$ 822

X

- Definition

The amount of an entity’s obligation to transfer goods or services to a customer for which the entity has received consideration (or the amount is due) from the customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2024-01-01
-Paragraph 105
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-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2024-01-01
-Paragraph 116
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_116_a&doctype=Standard
-URIDate 2024-03-27

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The amount of the transaction price allocated to the performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period. The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties (for example, some sales taxes). [Refer: Performance obligations [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2024-01-01
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-URIDate 2024-03-27

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